Challenges

Implement a rate limiting middleware that limits requests per IP address. Start with the provided skeleton and complete the implementation.

Authentication middleware is not protecting routes correctly. The order of middleware matters!

An async function is not waiting for data to load before processing. Fix the promise handling issue.

Analyze this code and predict the output order. Explain why the output appears in that order.

A React component is causing an infinite re-render loop. Find and fix the useEffect dependency issue.

A Kubernetes deployment is failing to start. Debug the manifest and fix the configuration issues preventing pods from running.

A Docker build is taking too long and creating huge images. Optimize the Dockerfile for faster builds and smaller images.

A database query is vulnerable to SQL injection attacks. Fix the security issue using parameterized queries.

Analyze a complex requirement for payment retry functionality. Consider failure scenarios, security implications, and user experience.

Create comprehensive documentation for a TypeScript event emitter system. Focus on type safety and usage patterns.

An AI generated a PR for JWT token refresh functionality. Find the hallucinations, logic errors, and security issues before it gets merged.